Circuit breaker



FIG. 1 is a isometric view of the embodiment of the new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left view thereof;

FIG. 5 is a right view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken line portion of the figure drawings is included to showsubject matter that forms no part of the claimed design.

CLAIM The ornamental design for circuit breaker, as shown and described.